From 0350d52aabcc40952d32071c79961a0e928437ba Mon Sep 17 00:00:00 2001
From: provokateurin <kate@provokateurin.de>
Date: Tue, 22 Jul 2025 14:25:47 +0200
Subject: [PATCH] fix(\OC\DB\Adapter): Ensure insertIfNotExist is atomic

Signed-off-by: provokateurin <kate@provokateurin.de>
---
 lib/private/DB/Adapter.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/private/DB/Adapter.php b/lib/private/DB/Adapter.php
index 8f1b8e6d75f48..c02220c244200 100644
--- a/lib/private/DB/Adapter.php
+++ b/lib/private/DB/Adapter.php
@@ -103,7 +103,10 @@ public function insertIfNotExist($table, $input, ?array $compare = null) {
 		$query .= ' HAVING COUNT(*) = 0';
 
 		try {
-			return $this->conn->executeUpdate($query, $inserts);
+			$this->conn->beginTransaction();
+			$rows = $this->conn->executeUpdate($query, $inserts);
+			$this->conn->commit();
+			return $rows;
 		} catch (UniqueConstraintViolationException $e) {
 			// This exception indicates a concurrent insert happened between
 			// the insert and the sub-select in the insert, which is safe to ignore.